Grinding apparatus



2 Sheets-Sheet. L

4 w. JIGREENLERF" GRINDING APPARIAZFDUS Filed July 15, I941 Nov. 2, 1943.

l'mventor WALTER d GRENLAF Nam 2, 1943. w.v J. GREENLEAF GRINDING: AHBARATUS' Filed? July; 15, 1941i ZYShQeIbShSheet 2,

3nventor WALTER J. Gfiff/VLEAF Patented-Nov. 2, 1943 Walter J. Greenleah Meadville, Pa. assignor to MoQrosky IoolCorporation, Meadville, Pa.

Application .iulyis, 1941-, seria1 No. 402,447

121Claims. This invention relatesto grinding apparatus,

and, particularly, isivooncerned 'with apparatus of this type adapted to grind, surface, shoulder, or otherwise treat shape or dress amao-hine tool orthelike.

a It is the generafobj ect of my inventionto provide relatively simple, inexpensive, readilyfops erated, apparatus of relatively lightwveight and small size for grinding machine tools and the like and which can be very quickly adjusted and operated to perform substantially any desired-operation of this character, v I

Another object of my invention isthe provision of tool grinding apparatus and the like and wherein costly machine V-slides are eliminated by the usenof a completely practical and much less expensive type otsllde and which are positioned at points in the apparatus so that sub: stantially no dust from the grinding'operation can work into the slide. 1 Another object of my invention is .the provi sion of improved apparatus of the character indicated and wherein ball and socket means of an almost instantaneously adjustable nature are provided for. supporting the tool at exactly the angle desired during the grinding operation. Another object of my invention is 'theprovision means.

oi improved motor mounting Another object of my invention is to provide apparatus for grinding tools and the like and wherein the vise for supporting the tool is readily adjusted either longitudinally or laterally of the apparatus and can be guickiy clamped atany desired tilted angle. H

Another object of my invention is the provision of grinding apparatus for forming chip breaking shoulders on a machinetool, or for performing other similar operations, and wherein the tool ,is readily clamped at the desired angle and [the grinding wheel is moved over the top of the tool and with all parts .of the apparatus supporting the grinding Wheel. in its sliding movement being so protected, covereclf-and positioned, that it is substantially impossible .ior any deteriorating amount of grinding dust to Work into the sliding support for the grinding wheel andthereloy lessen its operating life. I H p t For a better understanding "eirny invention reference should be had to the'acc mpanyi g drawings wherein Fig. 1 is a side elevation partly in section of one embodiment of my apparatus;

of'the apparatus structure} Fig. 3 is a cross-sectional viewftaken on line III-1110f Fig. 2; and Fig. 4 1's a cross-sectional view taken on line vfi 'offigfl.

vIn thedrawings, the numeral l0 indicates generally a base member usually formed with a flat side-I2 and acurved side M. Formed integral with the base member I0 is a flat, slightly upraised table' It having a ground or machined upper-surface and'provided with a longitudinally extending "slot 1-8; A vise, indicated as a whole by thenumeral-Z 0; has a bottom portion 22 which is mounted in'a'longitudinally adjustable positionnntopofthetable 4'6. This is ordinarily ac-hievedhy providing" the support 22 with later 26 that extend into "theslot a in the table It.

Thus thesuppo rt 22 for the vise"20 can be readscrewed onto the bolt '30 on opposite sides of the lug32 provide means for adjusting theturret 28 laterally of the base [H] on the support 22. order to clamp the turret 28 on the support 22 in the adjustedposition, I provide clamping means whichm aytakethe form o f a cap screw 35 which extends upwardly through a slot 38 running along the center linejof the support 22. The cap screw 36 extends upthrough the center of the turret 2B and threaded on the end of the cap screw 361s a clamping nut illhaving' an operating arm 42 secured thereto. 'The operating arm 42 extends out throu'gh'theside of the turret 28 which is suitably slotted horizontally to permit the arcuatetinovement of the operating arm 42. The

FigyZ is a plan view of the apparatus shown in Fig. -1 but with the greater part of the tank for supplying cutting fluid to the grinding wheel be ing broken away to better illustrate the details clearance between the several parts of the structure just described, and the thread pitch of the cap screw 35 and clamping nut {Wis such that a relativelysmall arcuate movement of the operating arm 42 willeitherclamp or release the turret TZ BOn' the support 2 2. Before leaving the desQt PtiOn 0f thejmounting of the turret 28 on he-support 22, it should benoted that incertain installations I may dispense with the use of the 32, andnuts 34. When this mechanism isnot employed the clamping action provided Joy the cap"scr ew 35 and clamping nut is all that is requiredfland the turret '28 is moved lo'yh'and laterally oithe base In and can also be ally extending ear members 24 which receive bolts moved angularly about the cap screw 36 as a pivot. However, I usually employ the bolt 30 and associate mechanism in the preferred embodiment of my invention although I am not to be limited to their use.

The top of the turret 28 is formed as a socket and tiltably receives a ball member 46 which is adapted to be clamped in the turret by mechanism which includes a stud bolt 48 extending axially through the ball member 46 and the turret 28. The lower end of the stud bolt 48 is threaded and receives a clamping nut 50 having an operating arm 52 secured thereto and extending j out laterally of the turret through a suitable slot cut in the side wall of the turret. The upper end of the stud bolt 48 carries a half ball 54 which is adjustably mounted on the stud bolt by suit- The half ball is Y into the end of the stud bolt to lock the half ball in the desired position on the end of the stud bolt. By these means any wear on the ball member, half ball 54 or other parts of th assembly may be readily compensated for so that the desired clamping action of the ball member 46 to the turret 28 and in any position is achieved by moving the operating arm 52 carried by the clamping nut 58. The half ball 54 is received within a suitable hemispherical the ball member 46.

v Th ball member 46. carries the vise proper which may obviously take a plurality of forms. The purpose of the vise proper, which has been indicated by the numeral 62, is to support any desired article to be ground. When working on machine tools, bits, and other similar articles, for which the present invention is particularly adapted, I ordinarily provide a vise proper which is in the form of a U-shaped channel or bracket having its base portion secured byany suitable 'means to any desired tapped hole 64, T-slots: or

recess in the centerof port the shaft 80 between them with the shaft 80 being parallel to the base ill but spaced at a considerable vertical distance thereabove. As best seen in Fig. 3, the carriage It has secured to its under side a block 82 which mounts rotatably a pair of rollers 84 at right angles to each other and so they Will roll upon the upper surface of the shaft 89. Cooperating with the rollers '84 is a roller 56 rotatably carried by a suitable bracket 88 secured to the carriage fill, One unit or assembly of rollers 84 and 86 is mounted near one end of the carriage l0, and a second unit or assembly of rollers 84 and 8% is mounted near the other end of the carriage 1B so that the carriage is;given rolling support on the shaft 85.

Before leaving the unit or assembly of rollers 84 and 86 shown in Fig. 3 it should be noted that other means formedv in the upper surface of the ball member 45. The sides of the channel shaped vise proper carry one or more clamping screws 66 which can be readily moved inwardly to grip a tool or other member to be ground firmly between the sides of the channel. To simplify the illustration of my improved apparatus, and to render the showing thereof clearer, Ihave not shown in Fig. 2 of the drawings the vise proper 62 illustrated in Fig. 1. However, it will be understood that in'the ordinary use of my apparatus some suitable means, such: as the vise proper 82, are ordinarily incorporated in the apparatus on top of the ball member 46.

In combination'w i th the vise for holding the tool or other memberto'be ground I provided a carriage, indicated as a whole by-the numeral 10,

which is mounted for sliding movement parallel to the base In and in a position offset laterally from the vise assembly 20. Specifically, the carriage m, having a sh pe in plan as shown in Fig. 2 of the drawings and a downwardly extending flange I2 around substantially the entire periphcry of the carriage, is given a three point sliding support'o-n the base member"! a. This is achieved the roller 36 is not positioned directly opposite the rollers 84, but instead, is mounted in a plane having substantially an angle of about 20 degrees with the vertical. This construction has been found tobe superior from the standpoint of wear and wear takeup of the parts of the roller assembly. Obviously, the wear on the rollers 8'4, 86 and shaft 80 is relatively small, particularly inasmuch as they are substantially covered and protected by, the. flange 72 on the carriage Ill. The roller B6,,of course, keeps the carriage It from jumping off of the shaft 80. v

The carriage IE! is also given sliding support on the base Hi at a third point. Having reference to Fig. 4, the numeral 90 indicates a bracket secured to the base It. The bracket 90 carries a cap screw 92 which extends through a longitudinally extending slot 94 formed in the carriage Ill. Sufficient clearance is allowed between the head of the cap screw 92, and the carriage 'fi'fl so'that a free sliding movement of the carriage ID with respect to the cap screw 92v is obtained- It should be noted in conjunction with the structure shown in Fig. 4 that substantially all of the weight carried by the carriage Ti], and hereinafter described, is concentrated above the shaft 80. Thus, the weight of the carriage on the bracket 90 is relatively small and friction is at'a' minimum al-, though no rolling sup'portfor the carriage is provided. Although I may, of course, employ some suitable rolling support for the carriage 10 on the bracket 9!] I have found that this is unnecessary in most instances and adds to the expense of the structure where only a steadying action is required by the bracket 90.

The extent of longitudinal movement of the carriage H! on the base it] can be readily controlled, adjusted, or limited. For this purpose I provide an arm 96 which is secured to one end of the carriage. The arm 96 carries a rod 98 which extends slidably through a support H30 fastened to the bracket 16. Collars I82 adjustably positioned on the rod 98 control the extent of longitudinal movement of the carriage ill by striking the support Hi6 carried on the bracket I have provided relatively simple but positive means for moving the carriage H1 longitudinally of the base It. Particularly, I form a bracket I06 integral with the bracket 18 and to the bracket m6 pivotally secure a link I88. The other end of the link I08 is pivotally secured to an arm by mounting brackets 16 and l8'on opposite ends 1 of the base It with the brackets serving to sup- H0 having an operating handle H2 which ex tends out to the front of the machine and in a position handy to be reached and operated by the user of the apparatus. The arm HE] is pivotally secured at ll4to a suitable lug H6 formed integral with the end of the carriage 19. By

moving jthe" hamile-jfl baek and forth a horizontal plane flieoarfiage'm is given'a desired movement. 1

A motor platform 11'" is pivots/Hy minim-ted on the carriage "H! as by means of pointed pivot screws 12! ext-existing through suitably topped openings formed in upstanding lugs H4 carried by or formed integrafly bh the carriage". pointed pivot screws P22 extend into suitable conical recesses provified in the sifies of an extension 1 26 formed integral with the motor platform me. Look "nuts 12'8 serve to secure the pointed screws l2! in their sdiiustecl posiiThe nn'pivoted :end of the motor platform 1.21! "is adjustable vertica'll'yri'n any suitable man ner. Conveniently Iprovide a vert ic'ahy extend ing post T31! wvhionfis secured tom formed integrally with the top of the marriage 1!) and which supports .a bolt f8! "which extends up through a more recess in the motor plat iorm I21) and carries a hand wheel not 18!. A coiled bompress innl'spring 13E posrtienedbetween' the carriage 1'0 and the motor platform I serves to wheel Hut 134. Editable micrometer means 438 may be associated with -the hanfi wheei not 1% so that the exact vertical position of the u :p'i'voted end of the motor platform I220 is indicated 'at all times.

Mouritefi upon the motorbraeket i 20 is=an-lectrio motor M 'whic'nhas a chive shaft 442 on which is mounted -a grinning Wheel I. Ordina-Tii'y, I provide some suitable cutting or cooling medium which is adaptedto be continuously diseharged or dropped upon the grim'ling wheel 4-. Thisis conveniently accomplished by the p1 0- of a storage tank MB having downwardly Extenamg re s "portions Ma "which sesame the motor W0 and which are seemed to the motor v bracket .I'ZO by a suitable *snoh as screws 1'51]. The storage tank 4'46 has a r-1 outlet tube .H'rg extending therefrom and terminatingot a point immediately above the "grinding wheel "asbest seen in Fig. ,1. A vaive I 5! controls the flow 'oi fluid from *the *tarrik 1W6 throug-htheo-connun I52. Adjusting the waive 4 54 gives exactly the desired type of flow 'of the outting or codlingmedium from t'I're-tankH-OB Pfor any given type of grinding operation. The storage tank -M'6 has not been illustrated compltly in Fig. 2 of the timings, but has been broken away to better illustrate the assembly of the apparatus.

It is believed that the operation of my im- *proved apparatus will be opparently 'from the foregoing 'ctetaiile'cl eleseription. However, briefly reviewing the operation of my improved apparestus, 'a tool or other member so *be ground is mounted-in the vise proper 62 being clamped position iby means of 'the screws 56. "The oan member 16 is thenftiltei or adjusted to ithe tiesired position anti the-operating arm B2 is tightened to clampthe ball member #6 in the desired nosition, "Theturret "2 8-of the vise assembly '20 \is then moved iaterally of the base member Why adjusting the mits "M 'and is clamped tightly in "position bythe operating'amm W2; Thepos'i-tion; of 'tlrre'vise assembly '2!) on the base Hi is controlled by the bolts 26 which may be loosened and ithe whore vise assembly moved 'longitn-dinally-of the base member to the 'desired position aii ter whieh the bolts 26 are tightened. It will 'be reoognized that the exact sequence of --'a'diusting operations .as just described may be 'variedconsiderably, iblIl? that "in any event after anof the adjustments are made the tool or 'otherarticles to-be ground will be held in the desired relation and-at the proper angle tor the-grindingoperation. l

The vertical position or the grinding iwiheel l with respect toithe tool or other article toabe 5 ground is now adiiu'stec i :by means of the'handw'heei not 134, and the motor M0 is started :by closing suitable switch means not shown).

Thereafter, the handle '2 is grasped :bythe opera-tor of ethe appanatus .and is swung in a 11011 10 zontal direction to move theicarriage Tiil inaarhonioer-ital plan-e totttrereby cause the grinding wheel [44 to pass over the tool or-other article 120 be ground. This movement results in 'agrinding cut of desired extent upon ithe surface of the tool i=5 or other articles being ground. Adjusting the hand-wheel n ut Mal in :conjunction withxmovementibac k and ffonth tor the 'handle M32 :results'in a grinding operation of the desired extent 011 the tooltor other :artiolebeing ground.

From the 'fioregoing it will the recognized that objects of my invention have been achieved by a relatively simple, easily operated, :inexpen sive, fool-proof, 1mg meaningwapparatus of relatively small size and weight and oapab'let oi per- ,25 formingisubstantiallsany desired type of mind- -in-g' operation mpomtoolsizfior automatic machines i and the like. c rhe rose of expensive structural machine parts has been anoiden land mainte.

nance expense and care is at a minimum. Prostix sionihas been made 101' meadyrtakenpofany worn quarts in the assembly, anfithe arran ement [of parts :issueh that grinding idust cannot flail :upon any parts of the apparatus which are subject ,toioonsiderable-wear. I v 7 Although I have particuiarlydesoribefl my :in vention as remhody n axhorizontasl base, hermental teamageanovement, and the like, should be understood that any of the featuresof the :inmention my the embodied :in :apnanatus havin m, other than .a horizontal mate and horizon alznarxiage movement; 'fiherefore, rand becaruse of similar ialteratimis lWh'iQh :may be made in the apparatus without departing strain the spirit thereof, it should ,be particularly render-stood ilihazt I am not to be limited byoritothe particular] em- :bodiment of my-inven'tion which I ha-vezi-llnsltrattecl in :detail in accordance with ithe @atent statutes. Instead, :the scope of any invention is defined by .the appendedsclaiims.

I:o1aim.:.'"'-H 1.. Apparatusior igrind-i grohip breaking shouls :ders tamimheilike(comprising.aztoolvis aaball n soeket :supportifor raisemeans lampin ithe wise :in :any desired tilted 'DOSifi IL, L rbfifi meazns mounting the wise in 1a :loneitudinally stdiustable :position on the ,base, zmeans :ior eadjusting the lateral position tofithe 'vise (on the base, :a

"for movement sparaillel to (the :base i-bnt spaced laterally from the vise, means tor adiustobly limiting the movementlof the-earriagfi means :for effecting -m,ov em. ntof the carriage, ta --m otor 'bracleet jPiVQtrElL-Y i-seoured vA the marriage, va motor mounted on the bracke a grinding wh el carried my the {drive shaft-of the sending :toqa ,nosition acljaeenttthe mise meansflfor adjusting thennpivotedend of the motor braeket [to and :from, rthetcarriage, candmeans for snppl mg cuttingnnidrto thegrinding .wheel.

t2. Apparatus:far e in gechiphreakingshonle hers and the dike .comprising -a tool wise, a ball wand'sooketssupportfior theyise, means tor clamps: sing the wise tin anmdesireii tilted -:posi-tion,.-a base, means mounting the vise in a longitudinally fid- TF6 iustahle position ion'zthe haserneanafpr adjustmotor and ,ex;

ing the lateral position of the vise on the base, a carriage, means slidably mounting the carriage for movementparallel tothe'base but spaced laterally from the vise, means.- for effecting movement of the carriage, a motor bracket pivo-tally secured to the carriage, a motor mounted on the bracket, a grinding wheel carried by the drive shaft of the motor and, extending to a position adjacent the'vise, means for adjusting the unpivoted end of the motor bracket to and from the carriage, and means for supplying cutting fluid to the grinding wheel. 1 i

3.*Apparatus for grinding chi-p breaking shoulders and the like-comprising atool vise, a ball and socket support for the vise, means for clamping the vise in any desired tilted position, a. base, means mounting the vise in a longitudinally adjustable position on the base, means for adjusting the lateral position of the vise on the base, a carriage, means slidably. mounting the carriage for movementparallel to the base but spacedflaterally from the vise, means for effecting movement of the carriage, a motor bracket pivotally secured to' the'carriage, a motor mounted on the bracket, a grindingwheel carried by the drive shaft of vthe motor and extending to a position adjacent'the'vise, and means for adjusting the unpivoted end of the motor bracketto and from the carriage.

4. Apparatus for, grinding chip breaking shoulders" and the, like comprising a tool vise, a ball and socket support for the vise, means for clamping the vise in any desired tilted position, a base, means mounting the vise on the base, means for'adjusting the'lateral position of the vise 0n thebase, a carriage, means slidably mounting the carriage for movement. parallel; to the base but spaced laterally from the vise, means for effecting movement of the carriage, a motor bracket pivotally secured to the carriageya motor mounted on the bracket, a grinding wheel carried by the drive shaft of the motor and extending to a position adjacent'the vise, and means for ac.-

justing the unpivoted end of the motor bracket to and from the carriage. l

' 51- Apparatus for grinding chi p breaking shoulders and the like comprising a tool visega ball and socket support for the vise, means' for clamping the vise in any desired tilted position, a

base, means mounting the vise on the base, means I for adjusting the lateral position of the vise on the'base, a carriage,'means slidably mounting the carriage for movement parallel to the base, means for effecting movement of the carriage, a

motor bracket pivotally secured to the carriage, a

motor mounted on the bracket, a grinding wheel carried by the drive shaft of the motor and extending to a position adjacent the vise, and means for adjusting the unpivoted end of the motor bracket to and from the carriage.

' 6. Apparatus for grinding chip breaking shoulders and the like comprising a tool vise, a ball and socket support for the vise, means for clamping the Vise in any desired tilted position, a base, means mounting the vise on the base, means for adjustingthe lateral position of the vise on the base, a carriage, means slidably mounting the carriage for movement parallel to the base, means for effecting movement of the carriage, a motor, means adjustably mounting the motor on the carriage whereby the motor can be moved toward or from the carriage, and'a grind.- ing wheel-carried by the motor and extending adjacent the vise.

- 7. In combination in apparatus for, grinding articles, means for; clamping at any desired angle the article to beground, a base, means for adjustablysecuring the clamping means to the base in a longitudinally and laterally adjustable position, a bar, means mounting the bar .in a position extending longitudinally of the base and parallel thereto but spaced therefrom, said bar being laterally offset from the clamping means, a carriage, a plurality of longitudinally offset groups of rollers mounted on the carriage and engaging in rolling relation with the bar, a motor, means mounting the motor for movement to and from the carriage, means for adjusting the. position of the motor with respect to the carriage, a grinding wheel driven by the motor, linkage means for moving the carriage along the bar, and means slidably supporting the carriage on the base at a point remote from the bar.

8. In combination in apparatus for grinding articles, means for clamping at any desired angle the article to be ground, a ,base, means for adjustably securing the clamping means to the base in alongitudinally andlaterally adjustable position, a bar, means mountingthe bar in a position-extending longitudinally of the base and parallel thereto but spaced'therefrom, said'bar being laterally offset from the clamping means, a carriage, a plurality of a longitudinally offset groups of rollers mounted on the carriage and engaging in rolling relation with the bar, a motor, means mounting the motor for movement to and from the carriage, means for adjusting the position of the motor with respect to the carriage, a grinding wheel driven by the motor, and linkage means for moving the carriage along the bar. i I 9. In combination in apparatus for grinding articles, means for clamping at any desired angle the article to be ground, a base, meansfor adjustably securing the clamping means to the base in a longitudinally and laterally adjustable position, a bar, means mounting the bar in a position extending longitudinally ofthe base and parallel thereto but spaced therefrom, said bar being laterally ofiset from the clamping means,

a carriage, aplurality of longitudinally offset groups of rollers mounted on the carriage and engaging in rolling relation with the bar, a motor, means mounting the motor for movement to and from thecarriage, means for adjusting the position of the motor with respect to the carriage, and a grinding wheel driven by the motor.

10. In combination in apparatus for grinding articles, means for clamping the articleto be ground, a base, means for adjustably securing the clamping means to the base in a longitudinally and laterally adjustable position, a bar, means mounting the bar in a position extending longitudinally-of the base and parallel thereto but spaced therefrom, said bar being laterally oifset'from the clamping means, a carriage, a plurality of longitudinally offset groups of rollers mounted on the carriage and engaging in rolling relation with the bar, a motor, means mounting themotor for movement to and from the carriage, and a grinding wheel driven by the motor.

for driving the grinding wheel, means mounting the grinding wheel and driving means forsliding movement in a plane, a base, ball and socket vise means for supporting on the base an article to be ground, a screw extending radially of the ball and socket vise means, a handle nut associated ii. In combination, a grinding wheel, means stantially in alignment with the first screw, and i a second handle nut associated with the vsecond screw for clamping and unclamping upon a relatively short throw the Visa means from the base.

12. In combination in apparatus for grinding articles, means for clamping the article to be ground, a base, means for adjustably securing the clamping means to the base in a longitudinally and laterally adjustable position, a bar, means fixedly mounting the bar in a position extending longitudinally of the base-and parallel thereto but spaced therefrom, said bar being laterally offset from the clamping means, a carriage, roller means on the underside of the carriage and engaging with the bar, a downwardly extending flange around substantially the entire outer'periphtry of the carriage and surrounding the bar and roller means and keeping them free of dust, a motor, means mounting the motor on the carriage for movement to and from the carriage, and a grinding wheel driven by the motor.

WALTER J. GREENLEAF. 

